An onedimensional performance simulation was made to solve the problem that the knock limited power of a 2stroke aviation engine decreases due to the use of aviation kerosene. Several technical measures were proposed to boost the knock limited power of engine. Under the rated condition that specific fuel consumption and exhaust temperature did not deteriorate

adding antiknock additive

decreasing compression ratio and retarding ignition timing mitigated the knock tendency after using kerosene as the fuel instead of gasoline. Enlarging cylinder diameter and decreasing the Airfuel ratio were beneficial to the recovery of knock limited power of engine. Result showed that，after optimization

the engine regained 96% of original output power. The specific fuel consumption increased by 19% and exhaust temperature increased by 57K. The research results provide the basis for performance optimization and work reliability of twostroke kerosene engine.